Hide password in Command Line - Console Application in Windows 2000

Posted on 2004-04-29
Last Modified: 2007-12-19

I am working on a commnad line Application in C# on Windows 2000. I want to let user enter the password on command prompt, How I can hide the typed characters (the password text), after asking to input?

Question by:jss99
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Expert Comment

ID: 10954157
Hi jss99,
    I think this link will bring you to the way to hide password on Commandline Applicaiton.
    Any problem, please let me know.

Author Comment

ID: 10954650
Thanks, but this "ConsoleKeyInfo" thing does not work for me. I am using Framework 1.1 and VS .net 2003. Is there any special reference needs to be added?

Expert Comment

ID: 10956386
using System;
using System.Text;

class a
      Console.Write("Input a password: ");
      StringBuilder sb = new StringBuilder();
      while (true)

            ConsoleKeyInfo cki = Console.ReadKey(true);
            if (cki.Key == ConsoleKey.Enter)
            if (cki.Key == ConsoleKey.BackSpace)
                  if (sb.Length > 0)

      Console.WriteLine("Your password is: {0}", sb.ToString());


Accepted Solution

Vaishali_chaudhry earned 125 total points
ID: 10956795
If i have understood the Q are asking the user to enter the passwprd on the command prompt and then when he types the want the passwd not to be visible .

See the following sample:it uses ConsoleEx.dll

using System;
using Microsoft.GotDotNet;

namespace ConsoleApplication1
      /// <summary>
      /// Summary description for Class1.
      /// </summary>
      class Class1
            /// <summary>
            /// The main entry point for the application.
            /// </summary>
            static void Main(string[] args)
                  char c='a';
                  string s="";
                  Console.WriteLine("Enter your password:");
                  Console.WriteLine("Your password is :{0}",s);


you can download ConsoleEx.dll from

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